Financial Instruments (Foreign Exchange Contracts Outstanding, Maturity Dates And Unrealized Gain (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Derivative [Line Items]
UNREALIZED GROSS GAIN (LOSS)	$ 24	$ (154)	$ 503
Foreign Exchange Contracts [Member]
Derivative [Line Items]
CONTRACT AMOUNT U.S. $ EQUIVALENT	39,420	28,471
UNREALIZED GROSS GAIN (LOSS)	24	(154)
Euro [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
CONTRACT AMOUNT U.S. $ EQUIVALENT	10,642	11,931
MATURITY DATE	2012	2011
UNREALIZED GROSS GAIN (LOSS)	151	(75)
Sterling [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
CONTRACT AMOUNT U.S. $ EQUIVALENT	4,657	5,267
MATURITY DATE	2012	2011
UNREALIZED GROSS GAIN (LOSS)	(5)	(37)
Japanese Yen [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
CONTRACT AMOUNT U.S. $ EQUIVALENT	12,006	4,529
MATURITY DATE	2012	2011
UNREALIZED GROSS GAIN (LOSS)	(112)	(27)
Hong Kong Dollar [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
CONTRACT AMOUNT U.S. $ EQUIVALENT	4,569	5,140
MATURITY DATE	2012	2011
UNREALIZED GROSS GAIN (LOSS)	(16)	(8)
Taiwan Dollar [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
CONTRACT AMOUNT U.S. $ EQUIVALENT	1,526	1,604
MATURITY DATE	2012	2011
UNREALIZED GROSS GAIN (LOSS)	(13)	(7)
Mexican Peso [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
CONTRACT AMOUNT U.S. $ EQUIVALENT	1,020
MATURITY DATE	2012
UNREALIZED GROSS GAIN (LOSS)	(13)
Chinese Renminbi [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
CONTRACT AMOUNT U.S. $ EQUIVALENT	5,000
MATURITY DATE	2012
UNREALIZED GROSS GAIN (LOSS)	$ 32